Upgrade less from 2.5.1 to 2.7.2

[ficristo]

I would like to upgrade grunt related dependencies and this was in the way: updating only the grunt dep without the thirdparty didn't seem good.
I renamed less-2.5.1.min.js to simply less.min.js, you can see the version in the comments inside the file.

[zaggino]

could we maybe switch to npm dependency instead?

[ficristo]

I'm all for moving to npm.
But has pointed out before by @busykai, we need to do something about the increase size of the bundle.
For example less 2.7.1 from npm is about 3MB, but the minified file is only 140kB.
I have some random thought but still nothing good.
So WDYT?

[zaggino]

Is it about npm not providing minified file or about npm providing too many files that we don't need?

[ficristo]

Too many files, I've opened #13020 as a possible solution

[ficristo]

Now it is fetched from npm.

[zaggino]

👍 cool

[ficristo]

Thank you.